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Preparing your site

About this section  Top

This section tabulates the following information:

Your site must be capable of housing disk shelves with these requirements.

Disk shelf dimensions  Top

The following table lists the dimensions of the disk shelf.

Dimensions

U.S.

Metric

Height

5.25 in. or 3U, where 1U = 1.75 in.

13.3 cm

Width

17.6 in.

44.7 cm

Depth

20 in.

50.85 cm

Disk shelf weight  Top

The following table lists the weight of a single disk shelf based on its configuration.

Weight

U.S.

Metric

When empty

50.6 lbs

23 kg

With 14 disk drives

77 lbs

35 kg

Space requirements  Top

For the disk shelf to have the proper operating conditions, the front of the disk shelf must be at least 1 inch from the nearest obstruction. The back of the disk shelf must be at least 6 inches from the nearest obstruction.

Environmental conditions  Top

The following table lists the maximum environmental conditions that your site must meet to properly run or store your disk shelf and storage appliance.

Environmental condition

Operating condition

Storage condition

Temperature range

50° F to 104° F
(10° C to 40° C)

-40° F to 149° F
(-40° C to 65° C)

Relative humidity (noncondensing)

5% to 95%

5% to 95% in original shipping container; otherwise, 50%.

Note
The recommended operating condition temperature range is 68 to 77º F (20 to 25º C).

Electrical requirements  Top

Voltage and inrush current requirements

The following table lists the inrush current and input voltage requirements with power applied to the disk shelf and storage appliance.

Current type

Input voltage

Inrush current

AC

220V AC

50A

110V AC

40A

DC

-60V DC to -40V DC

No greater than 20A under any conditions

Note
The DC power can operate from a -48V or a +48V DC source.

Power requirements

The following table describes the power requirements for the disk shelf connected to two 20A circuits based on a maximum PSU load.

Type of disk shelf

Volts

Amps per

disk shelf

Maximum number of disk shelves

DS14

100V to 120V AC

3.95

4

200V to 240V AC

1.90

8

-60V to -40V DC

7.50

N/A

Caution
Exceeding the allowed number of disk shelves can lead to power brownouts.

Power consumption and thermal rating

The power consumption (in watts) and the number of BTUs per hour produced by the disk shelf depend on the number and type of devices (for example, power supplies, disks, and so on) installed in the disk shelf.

The following table gives an example of average power consumption for one disk shelf with 14 disks, two fan/power supply units, and two LRC modules.

Type of disk shelf

Power consumption

Thermal rating

DS14

350W

1,191 BTUs/hr.

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